I have two on my aluminum flatbar commuter and will put two more on my Cervelo (and save a ton of money). They fit my small frames (46 and 51) and hold standard 750 ml bottles secure. I ride 150-350 km a week on city and country roads and need reliable cages; haven't lost a bottle in years. Good grip, but I do not ride off-road; at this price and weight, I'd try it.